Salmon-colored vat dyestuff and process of making same.



useful improvements in KRANZLEIN, 01"'IEIi CHST-QBLTHEMAIN, GERMANY, ASSIGNOR TO FABBWLRKE VORM. MEISTEE? LUCIUS z BRl 'NING', 3F

SALIWON-(YOLUREEG V DY U 1,025,195, fairest.

Hi GEISCE'-GN-THE-MAIN, GERMANY, A

AND PRGCESS OF MAKING SAIME.

Application June 21, 153%.

To a]! Mil-0W3 2'5 may concern Be it known that I, Gil-one Kai amas, Ph. 1)., chemist, citizen of thelfim' ire of f Germany, residing at H1 :hsl ithalifiain, Germany, ha e invented certain new and Salmon 4. Vat Dyes'tufi' and Processes oi i Same, of which the following is a .1 cation. I have focnd that 8-anthraquioonyl uresk l chlinicl and other bo-tliesof the general formu a in which "R" sianrls for a de ative of l formic acid, can be sformed into a red- I dish-brown vat d n sfiif dyeing cotton salmon-colored tints, in oluble alkalis and of hitherto .rnknown constitution, he heal;- ing than: to. a dry alkaline or a": a? conl l l I ut this process, for instance, pr: For-J3: f flenthraquinonyl-urea introducing phosgen in pension of [5-am1noanthrac trohenzene, are heated to .334. said nitro'ocnzene suspension. anhydrous sodium acetate for about one hour. After cooling, the mass filtered off and Washed with alcohol and Water, The dyestufi? thus obtained if? ins, when dry, a reddish-brown powder, insoluble in Water, alcohol, ether, benzene, nitrobe'nzcne, dilute acids and alkalis; dissolving in concentrated sulfuric acid with an emerald-green to bluegreen color which upon heating turns to a 4 pure blue color, unlike the {lanthraquznonyL urea-clzlorid, Which dissolves with a light yellow color. The new dycstufi gives I l 1 l l l I presence of alkaline hydrosulfite a reddishbrown Vat and dyes from this vat, particularly cotton, salmon-colored tints oi": excellent fasincss to Washing, to light and' chlorin; In the place of fi-anthraquinonyl-ureachlorid, there may be used fi an thraquinm nyl-isocyanate; or the fi-B-dianthraquinonylurea disclosed in U. S. Patent No. 958,325. Furthermore, there may be substituted for the sodium acetate, formates, carbonates or the like. 4

llfaving now particularly described my invention, What I claim is:

The process of manufacturing a new vat dyestufi dyeing cotton salmon-colored tints, which consists in heating a product 7 of the general formula in which R? formic acid, agent.

The prams-s of manufacturing a new vat dyes-ruff dyeing cotton salmon-colored tints, which consists in heating fl-anthra- (511inonyl-urea-chlorid and an alkaline condensing agent.

3. s a new product.

stands for a derivative of and an alkaline condensing I the vat dyestufi' liereinbefore descriucol, being a reddishgowder, insoluble in water, alcohol,

enzene, nitrobenzene, dilute acids 2 alis; solublein concentrated sulfuric h an emer: (l-green to blue-green tion which n, a; heating turns to a pure olue color; yieldiug'whcn treated Withan alkaline reducing agent like hydrosul fite, an orange-brown vat from which cotton is dyed salmon-colored tints of excellent fastness to washing, light and chlorin.

In testimony whereof, I ailix my signature in presence of two witnesses.

GEORG KRALNZLEIN.

Witnesses JEAN GRUND, CARL GRUND. 

